Polyploidy can be induced by the application of
Auxin
Kinetin
Colchicine
ethylene
$A$ normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
Match the columns :
Column $I$ |
Column $II$ |
$(1)$ Lethal mutation | $(a)$ Mutation caused by external factors |
$(2)$ Spontaneous mutation | $(b)$ They are metabolic errors |
$(3)$ Induced mutation | $(c)$ As a result the mutant dies |
$(4)$ Biochemical mutation | $(d)$ Most of the mutations occurs in nature are of this type. |
When two unrelated individuals or lines are crossed, the performance of $F_1$ hybrid is often superior to both its parents. This phenomenon is called
Single gene can exhibit multiple phenotypic expression, this is called.....
The affected individuals are short statured in disorders like